/Engine/Source/Runtime/Engine/Public/SkeletalMeshDeformerHelpers.h
Update all of the MeshObject's passthrough vertex factories with the currently allocated vertex buffers. Usually call this after all AllocateVertexFactory*() functions for a frame.
static void UpdateVertexFactoryBufferOverrides ( [FSkeletalMeshObject](API\Runtime\Engine\FSkeletalMeshObject) * InMeshObject, int32 InLodIndex )